TimeZoneInfo.GetSystemTimeZones 方法
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
多載
| GetSystemTimeZones() |
傳回有關本機系統上哪些資訊可用之所有時區的排序集合。 |
| GetSystemTimeZones(Boolean) |
ReadOnlyCollection<T>從本機電腦傳回包含所有有效 TimeZone 的 。 此方法 不會 擲回 TimeZoneNotFoundException 或 InvalidTimeZoneException。 |
GetSystemTimeZones()
傳回有關本機系統上哪些資訊可用之所有時區的排序集合。
public:
static System::Collections::ObjectModel::ReadOnlyCollection<TimeZoneInfo ^> ^ GetSystemTimeZones();public static System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo> GetSystemTimeZones ();[System.Security.SecurityCritical]
[System.Security.SecurityTreatAsSafe]
public static System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo> GetSystemTimeZones ();static member GetSystemTimeZones : unit -> System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo>[<System.Security.SecurityCritical>]
[<System.Security.SecurityTreatAsSafe>]
static member GetSystemTimeZones : unit -> System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo>Public Shared Function GetSystemTimeZones () As ReadOnlyCollection(Of TimeZoneInfo)傳回
TimeZoneInfo 物件的唯讀集合。
- 屬性
例外狀況
沒有足夠記憶體來儲存所有的時區資訊。
使用者沒有權限可讀取包含時區資訊的登錄機碼。
範例
下列範例會擷取一組時區物件，這些物件代表電腦上定義的時區，並將相關資訊寫入文字檔。
using System;
using System.Globalization;
using System.IO;
using System.Collections.ObjectModel;
public class Example
{
public static void Main()
{
const string OUTPUTFILENAME = @"C:\Temp\TimeZoneInfo.txt";
DateTimeFormatInfo dateFormats = CultureInfo.CurrentCulture.DateTimeFormat;
ReadOnlyCollection<TimeZoneInfo> timeZones = TimeZoneInfo.GetSystemTimeZones();
StreamWriter sw = new StreamWriter(OUTPUTFILENAME, false);
foreach (TimeZoneInfo timeZone in timeZones)
{
bool hasDST = timeZone.SupportsDaylightSavingTime;
TimeSpan offsetFromUtc = timeZone.BaseUtcOffset;
TimeZoneInfo.AdjustmentRule[] adjustRules;
string offsetString;
sw.WriteLine("ID: {0}", timeZone.Id);
sw.WriteLine(" Display Name: {0, 40}", timeZone.DisplayName);
sw.WriteLine(" Standard Name: {0, 39}", timeZone.StandardName);
sw.Write(" Daylight Name: {0, 39}", timeZone.DaylightName);
sw.Write(hasDST ? " ***Has " : " ***Does Not Have ");
sw.WriteLine("Daylight Saving Time***");
offsetString = String.Format("{0} hours, {1} minutes", offsetFromUtc.Hours, offsetFromUtc.Minutes);
sw.WriteLine(" Offset from UTC: {0, 40}", offsetString);
adjustRules = timeZone.GetAdjustmentRules();
sw.WriteLine(" Number of adjustment rules: {0, 26}", adjustRules.Length);
if (adjustRules.Length > 0)
{
sw.WriteLine(" Adjustment Rules:");
foreach (TimeZoneInfo.AdjustmentRule rule in adjustRules)
{
TimeZoneInfo.TransitionTime transTimeStart = rule.DaylightTransitionStart;
TimeZoneInfo.TransitionTime transTimeEnd = rule.DaylightTransitionEnd;
sw.WriteLine(" From {0} to {1}", rule.DateStart, rule.DateEnd);
sw.WriteLine(" Delta: {0}", rule.DaylightDelta);
if (!transTimeStart.IsFixedDateRule)
{
sw.WriteLine(" Begins at {0:t} on {1} of week {2} of {3}", transTimeStart.TimeOfDay,
transTimeStart.DayOfWeek,
transTimeStart.Week,
dateFormats.MonthNames[transTimeStart.Month - 1]);
sw.WriteLine(" Ends at {0:t} on {1} of week {2} of {3}", transTimeEnd.TimeOfDay,
transTimeEnd.DayOfWeek,
transTimeEnd.Week,
dateFormats.MonthNames[transTimeEnd.Month - 1]);
}
else
{
sw.WriteLine(" Begins at {0:t} on {1} {2}", transTimeStart.TimeOfDay,
transTimeStart.Day,
dateFormats.MonthNames[transTimeStart.Month - 1]);
sw.WriteLine(" Ends at {0:t} on {1} {2}", transTimeEnd.TimeOfDay,
transTimeEnd.Day,
dateFormats.MonthNames[transTimeEnd.Month - 1]);
}
}
}
}
sw.Close();
}
}
open System
open System.Globalization
open System.IO
open System.Collections.ObjectModel
[<EntryPoint>]
let main _ =
let OUTPUTFILENAME = @"C:\Temp\TimeZoneInfo.txt"
let dateFormats = CultureInfo.CurrentCulture.DateTimeFormat
let timeZones = TimeZoneInfo.GetSystemTimeZones()
use sw = new StreamWriter(OUTPUTFILENAME, false)
for timeZone in timeZones do
let hasDST = timeZone.SupportsDaylightSavingTime
let offsetFromUtc = timeZone.BaseUtcOffset
sw.WriteLine $"ID: {timeZone.Id}"
sw.WriteLine $" Display Name: {timeZone.DisplayName, 40}"
sw.WriteLine $" Standard Name: {timeZone.StandardName, 39}"
sw.Write $" Daylight Name: {timeZone.DaylightName, 39}"
sw.Write(if hasDST then " ***Has " else " ***Does Not Have ")
sw.WriteLine "Daylight Saving Time***"
let offsetString = $"{offsetFromUtc.Hours} hours, {offsetFromUtc.Minutes} minutes"
sw.WriteLine $" Offset from UTC: {offsetString, 40}"
let adjustRules = timeZone.GetAdjustmentRules()
sw.WriteLine $" Number of adjustment rules: {adjustRules.Length, 26}"
if adjustRules.Length > 0 then
sw.WriteLine " Adjustment Rules:"
for rule in adjustRules do
let transTimeStart = rule.DaylightTransitionStart
let transTimeEnd = rule.DaylightTransitionEnd
sw.WriteLine $" From {rule.DateStart} to {rule.DateEnd}"
sw.WriteLine $" Delta: {rule.DaylightDelta}"
if not transTimeStart.IsFixedDateRule then
sw.WriteLine $" Begins at {transTimeStart.TimeOfDay:t} on {transTimeStart.DayOfWeek} of week {transTimeStart.Week} of {dateFormats.MonthNames[transTimeStart.Month - 1]}"
sw.WriteLine $" Ends at {transTimeEnd.TimeOfDay:t} on {transTimeEnd.DayOfWeek} of week {transTimeEnd.Week} of {dateFormats.MonthNames[transTimeEnd.Month - 1]}"
else
sw.WriteLine $" Begins at {transTimeStart.TimeOfDay:t} on {transTimeStart.Day} {dateFormats.MonthNames[transTimeStart.Month - 1]}"
sw.WriteLine $" Ends at {transTimeEnd.TimeOfDay:t} on {transTimeEnd.Day} {dateFormats.MonthNames[transTimeEnd.Month - 1]}"
0
Imports System.Collections.ObjectModel
Imports System.Globalization
Imports System.IO
Module Example
Public Sub Main()
Const OUTPUTFILENAME As String = "C:\Temp\TimeZoneInfo.txt"
Dim timeZones As ReadOnlyCollection(Of TimeZoneInfo) = TimeZoneInfo.GetSystemTimeZones()
Dim sw As StreamWriter = New StreamWriter(OUTPUTFILENAME, False)
For Each timeZone As TimeZoneInfo in timeZones
Dim hasDST As Boolean = timeZone.SupportsDaylightSavingTime
Dim offsetFromUtc As TimeSpan = timeZone.BaseUtcOffset
Dim adjustRules() As System.TimeZoneInfo.AdjustmentRule
Dim offsetString As String
sw.WriteLine("ID: {0}", timeZone.Id)
sw.WriteLine(" Display Name: {0, 40}", timeZone.DisplayName)
sw.WriteLine(" Standard Name: {0, 39}", timeZone.StandardName)
sw.Write(" Daylight Name: {0, 39}", timeZone.DaylightName)
sw.Write(iif(hasDST, " ***Has ", " ***Does Not Have "))
sw.WriteLine("Daylight Saving Time***")
offsetString = String.Format("{0} hours, {1} minutes", offsetFromUtc.Hours, offsetFromUtc.Minutes)
sw.WriteLine(" Offset from UTC: {0, 40}", offsetString)
adjustRules = timeZone.GetAdjustmentRules()
sw.WriteLine(" Number of adjustment rules: {0, 26}", adjustRules.Length)
If adjustRules.Length > 0 Then
sw.WriteLine(" Adjustment Rules:")
For Each rule As TimeZoneInfo.AdjustmentRule In adjustRules
Dim transTimeStart As TimeZoneInfo.TransitionTime = rule.DaylightTransitionStart
Dim transTimeEnd As TimeZoneInfo.TransitionTime = rule.DaylightTransitionEnd
sw.WriteLine(" From {0} to {1}", rule.DateStart, rule.DateEnd)
sw.WriteLine(" Delta: {0}", rule.DaylightDelta)
If Not transTimeStart.IsFixedDateRule
sw.WriteLine(" Begins at {0:t} on {1} of week {2} of {3}", transTimeStart.TimeOfDay, _
transTimeStart.DayOfWeek, _
transTimeStart.Week, _
MonthName(transTimeStart.Month))
sw.WriteLine(" Ends at {0:t} on {1} of week {2} of {3}", transTimeEnd.TimeOfDay, _
transTimeEnd.DayOfWeek, _
transTimeEnd.Week, _
MonthName(transTimeEnd.Month))
Else
sw.WriteLine(" Begins at {0:t} on {1} {2}", transTimeStart.TimeOfDay, _
transTimeStart.Day, _
MonthName(transTimeStart.Month))
sw.WriteLine(" Ends at {0:t} on {1} {2}", transTimeEnd.TimeOfDay, _
transTimeEnd.Day, _
MonthName(transTimeEnd.Month))
End If
Next
End If
Next
sw.Close()
# Get timezone/date details and open a stream writer
$DateFormats = [System.Globalization.CultureInfo]::CurrentCulture.DateTimeFormat
$TimeZones = [System.TimeZoneInfo]::GetSystemTimeZones()
$OutputFileName = 'C:\Temp\TimeZoneInfo.txt'
$Sw = New-Object -TypeName System.IO.StreamWriter -ArgumentList $OutputFileName,$false
# Write overview information
$Sw.WriteLine('{0} Time zones on this system' -f $TimeZones.Count)
# Process each timezone on the system
# Write details to the streamwriter
foreach ($TimeZone in $TimeZones) {
$HasDST = $TimeZone.SupportsDaylightSavingTime
$OffsetFromUtc = $TimeZone.BaseUtcOffset
$Sw.WriteLine("ID: {0}" -f $TimeZone.Id)
$Sw.WriteLine(" Display Name: {0}" -f $TimeZone.DisplayName)
$Sw.WriteLine(" Standard Name: {0}" -f $TimeZone.StandardName)
$Sw.Write(" Daylight Name: {0}" -f $TimeZone.DaylightName)
$Sw.Write( $(If ($HasDST) {" ***Has: "} Else {" ***Does Not Have: "}))
$Sw.WriteLine("Daylight Saving Time***")
$OffsetString = "{0} hours, {1} minutes" -f $OffsetFromUtc.Hours, $OffsetFromUtc.Minutes
$Sw.WriteLine(" Offset from UTC: {0}" -f $offsetString)
$AdjustRules = $timeZone.GetAdjustmentRules()
$Sw.WriteLine(" Number of adjustment rules: {0}" -f $adjustRules.Count)
If ($AdjustRules.Count -gt 0)
{
$Sw.WriteLine(" Adjustment Rules:")
foreach ($Rule in $AdjustRules)
{
$TransTimeStart = $Rule.DaylightTransitionStart
$TransTimeEnd = $Rule.DaylightTransitionEnd
$Sw.WriteLine((" From {0} to {1}" -f $Rule.DateStart, $Rule.DateEnd))
$Sw.WriteLine((" Delta: {0}" -f $Rule.DaylightDelta))
if (-Not $TransTimeStart.IsFixedDateRule)
{
$Sw.WriteLine((" Begins at {0:t} on {1} of week {2} of {3}" -f $TransTimeStart.TimeOfDay,
$TransTimeStart.DayOfWeek,
$TransTimeStart.Week,
$DateFormats.MonthNames[$TransTimeStart.Month - 1]))
$Sw.WriteLine((" Ends at {0:t} on {1} of week {2} of {3}" -f $TransTimeEnd.TimeOfDay,
$TransTimeEnd.DayOfWeek,
$TransTimeEnd.Week,
$DateFormats.MonthNames[[int] $TransTimeEnd.Month - 1]))
}
else
{
$Sw.WriteLine((" Begins at {0:t} on {1} {2}" -f $TransTimeStart.TimeOfDay,
$TransTimeStart.Day,
$DateFormats.MonthNames[$transTimeStart.Month - 1]))
$Sw.WriteLine((" Ends at {0:t} on {1} {2}" -f $TransTimeEnd.TimeOfDay,
$TransTimeEnd.Day,
$DateFormats.MonthNames[$transTimeEnd.Month - 1]))
}
} # End of processing each adjustment rule
} # End of checking adjustment rules
} # End of processing Time Zones
# Close stream writer then display output in notepad
$Sw.Close()
# Output of 1st three time zones:
# 135 Time zones on this system
# ID: Dateline Standard Time
# Display Name: (UTC-12:00) International Date Line West
# Standard Name: Dateline Standard Time
# Daylight Name: Dateline Summer Time ***Does Not Have: Daylight Saving Time***
# Offset from UTC: -12 hours, 0 minutes
# Number of adjustment rules: 0
# ID: UTC-11
# Display Name: (UTC-11:00) Co-ordinated Universal Time-11
# Standard Name: UTC-11
# Daylight Name: UTC-11 ***Does Not Have: Daylight Saving Time***
# Offset from UTC: -11 hours, 0 minutes
# Number of adjustment rules: 0
# ID: Aleutian Standard Time
# Display Name: (UTC-10:00) Aleutian Islands
# Standard Name: Aleutian Standard Time
# Daylight Name: Aleutian Summer Time ***Has: Daylight Saving Time***
# Offset from UTC: -10 hours, 0 minutes
# Number of adjustment rules: 2
# Adjustment Rules:
# From 01/01/0001 00:00:00 to 31/12/2006 00:00:00
# Delta: 01:00:00
# Begins at 02:00 on Sunday of week 1 of April
# Ends at 02:00 on Sunday of week 5 of October
# From 01/01/2007 00:00:00 to 31/12/9999 00:00:00
# Delta: 01:00:00
# Begins at 02:00 on Sunday of week 2 of March
# Ends at 02:00 on Sunday of week 1 of November
備註
方法會 GetSystemTimeZones 從 Windows 系統上登錄 HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Time Zones 機碼的子機碼，以及從 Linux 和 macOS 上的 ICU 程式庫 擷取所有可用的時區資訊。 如果無法成功擷取和剖析個別 TimeZoneInfo 物件特定字串屬性的值，這個方法會將其值設定為空字串 (「」) 。
重要
方法 GetSystemTimeZones 只會針對 Windows 登錄或 ICU 程式庫中定義的時區，傳回 物件的集合 TimeZoneInfo 。 不包含使用 方法多載所建立的 CreateCustomTimeZone 時區。 這些只能透過時區建立方法所傳回的物件參考來存取。
這個方法傳回的集合會依 UTC 位移排序，而對於具有相同 UTC 位移的時區，則使用目前文化特性的顯示名稱。 如需顯示名稱的相關資訊，請參閱 DisplayName 。
ReadOnlyCollection<T>這個方法傳回的物件支援 IEnumerable<T> 介面，這表示可以使用 foreach C#) 中的 (逐一查看，或在 For Each…Next Visual Basic) 語句中使用 (。 迴圈的每個反復專案都會提供集合中的下一個 TimeZoneInfo 物件。
物件的集合 TimeZoneInfo 代表在本機電腦上定義的時區;它不一定為所有時段內的所有時區提供完整的資訊。 如果您的應用程式需要在本機電腦上找不到時區，您可以使用 方法的多 CreateCustomTimeZone 載來建立自訂時區。 如需詳細資訊，請參閱 如何：建立時區而不調整規則 和 如何：使用調整規則建立時區。
您也可以呼叫 FindSystemTimeZoneById 方法，並提供您想要擷取為參數的時區識別碼，以判斷本機電腦上是否已定義個別時區。
適用於
GetSystemTimeZones(Boolean)
ReadOnlyCollection<T>從本機電腦傳回包含所有有效 TimeZone 的 。 此方法 不會 擲回 TimeZoneNotFoundException 或 InvalidTimeZoneException。
public:
static System::Collections::ObjectModel::ReadOnlyCollection<TimeZoneInfo ^> ^ GetSystemTimeZones(bool skipSorting);public static System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo> GetSystemTimeZones (bool skipSorting);static member GetSystemTimeZones : bool -> System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo>Public Shared Function GetSystemTimeZones (skipSorting As Boolean) As ReadOnlyCollection(Of TimeZoneInfo)參數
- skipSorting
- Boolean
如果 true 為 ，則傳回的集合不一定會排序。
傳回
備註
將 skipSorting 參數設定為 true ，此方法會嘗試避免排序傳回的集合。 當呼叫端不需要已排序的清單，且旨在增強效能時，此選項會很有説明。
